Having looked into it, it's not clear at all how to do better at home than hosing it down with some plain water and spinning it dry-ish.
Soap ruins leafy vegetables. Dilute bleach seems strongly frowned upon. Vinegar doesn't necessarily kill enough things well-enough.
And water is just water. The efficaciousness of it reminds me of the handwashing scene from Pulp Fiction. https://www.youtube.com/watch?v=o4fDsq0k2rI